/* reset */
html,
body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
}

ul,
li {
    margin: 0;
    padding: 0;
    list-style: none;
}

/*virtual list*/
.viewport {
    width: 750px;
    height: 900px;
    overflow-y: auto;
    box-sizing: border-box;
    margin: 0 auto;
    background-color: #eeeeee;
}

.list-phantom {
    /* 高度要根据数据量来计算 */
    overflow: hidden;
}

li {
    box-sizing: border-box;
    height: 100px;
    margin-top: 10px;
    display: flex;
    align-items: center;
    padding-left: 20px;
    border-radius: 12px;
    /*border: 1px solid red;*/
    font-size: 20px;
    background-color: aquamarine;
}
